I have a bathroom sink and fixture which are about a year old. The drain has worked fine, until about a month ago. Recently, any water I try to hold in the sink slowly leaks out. This is mildly frustrating to our cat who likes to drink from the sink, but terribly irritating to me.
(I'm sure there are names for parts, but I have no idea what they are. Sorry about the following...)
Thinking the problem might be limited travel in the stopper lever (when you pull up the lever thing, at the top of its travel something hits under the sink) I got under the sink and adjusted the set screw and associated pieces so it was all shorter. Now when I pull the drain up, it is no longer klunking against something (apparently that was the set screw hitting the porcelain) so as near as I can figure the only thing stopping the drain from moving is definitely the stopper fitting into the drain. Yet water still slowly drains from the sink.
What else can I adjust? There seemed to be a lot of horizontal/rotational play in all the drain control parts under the sink; could that be the problem?